May Gómez

Universidad de Las Palmas de Gran Canaria

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Theodore T. Packard

Universidad de Las Palmas de Gran Canaria

Ico Martínez

Universidad de Las Palmas de Gran Canaria

Alicia Herrera

Universidad de Las Palmas de Gran Canaria

Natalia Osma

University of Concepción

Igor Fernández‐Urruzola

Millennium Institute of Oceanography

Santiago Hernández‐León

Universidad de Las Palmas de Gran Canaria

Daniel R. Bondyale-Juez

Universidad de Las Palmas de Gran Canaria

Vanesa Romero-Kutzner

Universidad de Las Palmas de Gran Canaria

Jorge Rapp

Universidad de Las Palmas de Gran Canaria

Mayte Tames-Espinosa

Universidad de Las Palmas de Gran Canaria

Cooperative Institutions

Universidad de Las Palmas de Gran Canaria

Consejo Superior de Investigaciones Científicas

Universidad de La Laguna

Instituto Español de Oceanografía

Universidad Autónoma de Madrid

Gobierno de Canarias

Universidad de Alcalá

Institut Català de Ciències del Clima

Institut de Ciències del Mar

Bigelow Laboratory for Ocean Sciences

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Modelling zooplankton respiration from ETS activity

Theodore T. Packard May Gómez

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Citations (0)

Toxicity of tire particle leachates on early life stages of keystone sea urchin species

Environmental Pollution (2023)

Sinja Rist Jessy Le Du-Carrée Kevin Ugwu Chiara Intermite Andrea Acosta-Dacal

Particles from tires are a major fraction of microplastic pollution. They contain a wide range of chemical additives that can leach into the water and be harmful to aquatic organisms. In this study, we investigated the acute toxicity of tire particle leachates in early life stages of three keystone echinoderm species (Paracentrotus lividus, Arbacia lixula, Diadema africanum). Embryos were exposed for 72 h to a range of leachate dilutions, prepared using a concentration of 1 g L-1. Larval growth, abnormal development, and mortality were the measured endpoints. Furthermore, we estimated the activity of glutathione S transferase (GST) and the electron transport system (ETS) in P. lividus. Strong concentration-dependent responses were observed in all species, though with differing sensitivity. The median effect concentrations for abnormal development in P. lividus and A. lixula were 0.16 and 0.35 g L-1, respectively. In D. africanum, mortality overshadowed abnormal development and the median lethal concentration was 0.46 g L-1. Larvae of P. lividus were significantly smaller than the control from 0.125 g L-1, while the other two species were affected from 0.5 g L-1. ETS activity did not change but there was a non-significant trend of increasing GST activity with leachate concentration in P. lividus. Seven organic chemicals and eight metals were detected at elevated concentrations in the leachates. While we regard zinc as a strong candidate to explain some of the observed toxicity, it can be expected that tire particle leachates exhibit a cocktail effect and other leached additives may also contribute to their toxicity. Our results emphasize the importance of multi-species studies as they differ in their susceptibility to tire particle pollution. We found negative effects at concentrations close to projections in the environment, which calls for more research and mitigation actions on these pollutants.

Paracentrotus lividus

Echinoderm

10.1016/j.envpol.2023.122453

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Citations (14)

Lagrangian tracking of long-lasting plastic tags: From lobster fisheries in the USA and Canada to Macaronesia

Marine Pollution Bulletin (2023)

Marcos Cividanes Borja Aguiar‐González May Gómez Alicia Herrera Ico Martínez

Plastic waste from the fishing industry, particularly lobster trap identification tags from the USA and Canada, poses a significant threat to marine ecosystems due to its resilience. This study unveils a novel link between North American fisheries and the appearance of these plastic tags in Macaronesia. Collected in the Azores and Canary Islands, these tags offer a unique insight into the sources and spatio-temporal scales of marine plastic pollution. Ocean model data indicates the Labrador Current and Gulf Stream as key forces transporting these tags. Virtual particle simulations show a small fraction reaching Macaronesia (4.12 % in the Azores, 0.76 % in the Canary Islands), suggesting real ocean drift. The Azores, with more collected tags, are more susceptible, and tags can reach Macaronesia in under a year. These findings underscore the urgency of better waste management and emphasize the role of citizen science in monitoring and combating marine pollution.

Plastic pollution

Marine ecosystem

Marine debris

Marine protected area

Marine Pollution

Plastic Waste

10.1016/j.marpolbul.2023.115908

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Citations (3)

Biomass and metabolism of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral spring

Polar Biology (1999)

Santiago Hernández‐León Santiago Hernández Torres May Gómez Irene Montero Puertas Carlos Almeida

Dry weight

10.1007/s003000050355

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Citations (31)

Testing zooplankton secondary production models against Daphnia magna growth

ICES Journal of Marine Science (2012)

May Gómez Ico Martínez Ismael Mayo José Miguel Morales Ángelo Santana

Abstract Gómez, M., Martínez, I., Mayo, I., Morales, J. M., Santana, A., and Packard, T. T. 2012. Testing zooplankton secondary production models against Daphnia magna growth. – ICES Journal of Marine Science, 69: 421–428. Modelling secondary production rates in the zooplankton is essential for population ecology studies, but assessing these rates is difficult and rarely done. Here, five secondary production models are tested by measuring Daphnia magna growth. To provide a range of growth rates, Daphnia were cultured under three different nutrition regimes (yeast, cornflour, and phytoplankton). Length and biomass were monitored daily in three simple time-course experiments to provide the growth rates, which ranged from 0.11 to 0.30 d–1 with secondary production rates of 350–643 µg dry mass d−1. Secondary production was predicted best by the freshwater crustacean-based model of Stockwell and Johannsson (1997). Marine copepod-based marine models were totally unsuitable.

Daphnia magna

10.1093/icesjms/fsr193

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Citations (8)

Microplastic ingestion by Atlantic chub mackerel (Scomber colias) in the Canary Islands coast

Marine Pollution Bulletin (2019)

Alicia Herrera A. Štindlová Ico Martínez Jorge Rapp Vanesa Romero-Kutzner

Scomber

Marine debris

Scombridae

10.1016/j.marpolbul.2018.12.022

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Citations (129)

Short-term patterns of vertical particle flux in northern Benguela: a comparison between sinking POC and respiratory carbon consumption

Journal of Marine Systems (2014)

Natalia Osma Igor Fernández‐Urruzola Theodore T. Packard L. Postel May Gómez

Sediment trap

Settling

Particulate organic carbon

10.1016/j.jmarsys.2014.01.004

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Citations (16)

Trophic transfer of DDE, BP-3 and chlorpyrifos from microplastics to tissues in Dicentrarchus labrax

The Science of The Total Environment (2023)

Alicia Herrera Andrea Acosta-Dacal Octavio P. Luzardo Ico Martínez Jorge Rapp

Microplastic pollution and associated chemical contaminants is a topic of growing interest. In recent years, the number of publications reporting the presence of microplastics (MPs) in marine organisms has increased exponentially. However, there is a gap in knowledge about the trophic transfer of contaminants from microplastics to animal tissues, as well as possible health effects. In this study we analyzed the trophic transfer and biomagnification of three chemical pollutants present in microplastics: dichlorodiphenyldichloroethylene (DDE-p,p'), benzophenone 3 (BP-3) and chlorpyrifos (CPS). The reference values used were concentrations found in environmental microplastics in the Canary Islands (minimum and maximum). European seabass (Dicentrarchus labrax) were fed for 60 days with 5 different treatments: A) feed; B) feed with chemical pollutants at maximum concentration; C) feed + 10 % virgin MPs; D) feed + 10 % MPs with chemical pollutants at minimum concentration; E) feed + 10 % MPs with chemical pollutants at maximum concentration. We detected trophic transfer of DDE-p,p', CPS and BP-3 from the feed (treatment B) to the muscle and liver of fish. In the case of DDE-p,p', transfer to liver and muscle was also observed in the treatments consisting of feed plus plastics with different levels of contamination (C, D and E). No effect of the experimental treatments on fish condition indices was observed.

Biomagnification

Dicentrarchus

Bioconcentration

Sea bass

10.1016/j.scitotenv.2023.163295

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Citations (4)

Influence of the north trade winds on the biomass and production of neritic plankton around Gran Canaria island

Scientia Marina (1989)

Javier Arı́stegui Santiago Hernández‐León May Gómez Leandro Rodríguez Medina O. Ojeda

The effect of the wind shear field on the southwest border of Gran Canaria Island (Canary Islands) causes the development of a marine front that fluctuates under the influence of the North Trade Winds. This front separates two areas on the island shelf: one of turbulence and one of calm, the latter in a wake of warm water to the south of the island. Monthly studies of biomass and production in phyto- and zooplankton and activity of the meiofauna have been done during the winter and spring of 1986-87, respectively, mainly from two stations approximately 50 m deep, one in each of the above-mentioned areas. Values of nutrients, primary production and mesozooplankton biomass and activity were higher than those provided by other authors for oceanic waters of the archipelago. Nonetheless, significative differences were found on both sides of the front. In the area of turbulence, phytoplankton was less abundant but more active, coinciding with higher concentrations of nitrate, as compared with the area of calm. Low values of cell numbers found in both areas may be explained by the grazing pressure of relatively large patches of mesozooplankton found towards the wind shear field, and also by physical processes causing dispersion at the more exposed station. Unlike the ocean, where the productive season is restricted to the late winter or early spring, in coastal waters planktonic production may be rather high troughout most of the year due to the action of the North Trade Winds, which continuously mix the surface waters.

Archipelago

Source

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Citations (25)

Repeated sequence RSa is diagnostic for Bradyrhizobium japonicum and Bradyrhizobium elkanii

Biology and Fertility of Soils (1996)

Alain Hartmann May Gómez J. J. Giraud Cécile Revellin

Bradyrhizobium japonicum

Bradyrhizobium

Sequence (biology)

Repeated sequence

10.1007/s003740050131

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Citations (6)